uart to rs485
This low power transceiver module is based on the Maxim MAX485 IC to allow serial communication over very long cable runs (up 4000 feet / 1200
meters). Serial data can be transmitted in both directions (half duplex) at a data rate up to 2.5Mbps. The modules operate from a standard 5V power supply
and use 5V logic levels allowing them to be interfaced to the hardware serial ports of microcontrollers such as Arduino/PIC etc. Direction of
communication can be controlled with just one digital pin (see diagram). It is also possible to connect multiple modules together for communication
between 2 or more devices. For even greater distances two modules can be configured as a repeater.
Each module contains one driver and one receiver. Drivers are short-circuit current limited and are protected against excessive
power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a
fail-safe feature that guarantees a logic-high output if the input is open circuit.
Data connections to the modules are provided by a standard 0.1″ pitch header pins which can also be soldered into standard
prototyping PCB and breadboards. Screw terminals provide convention connection to the actual data cable.
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